v3.26.1
Master Trust - Schedule of Master Trust Net Assets (Details) - Rail - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
LIABILITIES    
Net Master Trust assets $ 0 $ 16,930
Master Trust    
EBP, Master Trust [Line Items]    
Investments, at fair value 21,737,110 17,558,746
Fully benefit-responsive synthetic guaranteed investment contracts 745,342 780,302
Other assets    
Cash 5,609 12,700
Receivables for securities sold 10,745 113,787
Accrued income 39,453 31,300
Total Other assets 55,807 157,787
Total Master Trust assets 22,538,259 18,496,835
LIABILITIES    
Payables for securities purchased (26,413) (151,488)
Net Master Trust assets 22,511,846 18,345,347
Master Trust | Caterpillar Inc. common stock    
EBP, Master Trust [Line Items]    
Investments, at fair value 5,495,510 3,784,230
Master Trust | Common stocks    
EBP, Master Trust [Line Items]    
Investments, at fair value 3,921,926 3,360,443
Master Trust | Preferred stocks    
EBP, Master Trust [Line Items]    
Investments, at fair value 23,527 16,468
Master Trust | Preferred corporate bonds and notes    
EBP, Master Trust [Line Items]    
Investments, at fair value 5,481 7,570
Master Trust | Other corporate bonds and notes    
EBP, Master Trust [Line Items]    
Investments, at fair value 1,116,507 899,155
Master Trust | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments, at fair value 917,546 847,015
Master Trust | Common collective trusts    
EBP, Master Trust [Line Items]    
Investments, at fair value 10,071,355 8,473,155
Master Trust | Registered investment companies    
EBP, Master Trust [Line Items]    
Investments, at fair value 24,181 8,351
Master Trust | Other investments, net    
EBP, Master Trust [Line Items]    
Investments, at fair value 161,077 162,359
Plan’s Interest in Master Trust    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 16,299
Fully benefit-responsive synthetic guaranteed investment contracts 0 387
Other assets    
Cash 0 13
Receivables for securities sold 0 232
Accrued income 0 48
Total Other assets 0 293
Total Master Trust assets 0 16,979
LIABILITIES    
Payables for securities purchased 0 (291)
Net Master Trust assets 0 16,688
Plan’s Interest in Master Trust | Caterpillar Inc. common stock    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 290
Plan’s Interest in Master Trust | Common stocks    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 2,920
Plan’s Interest in Master Trust | Preferred stocks    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 22
Plan’s Interest in Master Trust | Preferred corporate bonds and notes    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 15
Plan’s Interest in Master Trust | Other corporate bonds and notes    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 1,773
Plan’s Interest in Master Trust | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 1,620
Plan’s Interest in Master Trust | Common collective trusts    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 9,456
Plan’s Interest in Master Trust | Registered investment companies    
EBP, Master Trust [Line Items]    
Investments, at fair value 0 10
Plan’s Interest in Master Trust | Other investments, net    
EBP, Master Trust [Line Items]    
Investments, at fair value $ 0 $ 193